import XEUtils from "xe-utils";

function broadcast(componentName, eventName, params) {
  this.$children.forEach(child => {
    var name = child.$options.name;

    if (name === componentName) {
      child.$emit.apply(child, [eventName].concat(params));
    } else {
      broadcast.apply(child, [componentName, eventName].concat([params]));
    }
  });
}

export default {
  methods: {
    dispatch(componentName, eventName, params) {
      var parent = this.$parent || this.$root;
      var name = parent.$options.name;

      while (parent && (!name || name !== componentName)) {
        parent = parent.$parent;

        if (parent) {
          name = parent.$options.name;
        }
      }
      if (parent) {
        parent.$emit.apply(parent, [eventName].concat(params));
      }
    },
    broadcast(componentName, eventName, params) {
      broadcast.call(this, componentName, eventName, params);
    },
    invoked(componentName, methodName, params) {
      try {
        let parent = XEUtils.filterTree(this.$root.$children, item => item.$options.name == componentName, { children: '$children' })
        parent[0].$options.methods[methodName](params)
      } catch (err) {
        console.error(err)
      }
    }
  }
};
